:root{
  --bg:#f5f7fb;--card:#fff;--text:#0f172a;--muted:#64748b;--line:#e2e8f0;--nav:#0b1220;
  --plan:#4f46e5;--do:#059669;--check:#d97706;--act:#e11d48;--shadow:0 18px 55px rgba(15,23,42,.10)
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Noto Sans Thai",system-ui,sans-serif;background:linear-gradient(180deg,#eef2ff 0,#f8fafc 32%,#f5f7fb 100%);color:var(--text);min-height:100vh;overflow-x:hidden}
a{color:inherit;text-decoration:none}.topbar{position:sticky;top:0;z-index:50;background:rgba(11,18,32,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.08)}.topbar-inner{max-width:1240px;margin:auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;align-items:center;gap:12px;color:#fff;min-width:0}.brand-mark{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#6366f1,#8b5cf6);box-shadow:0 10px 25px rgba(99,102,241,.35)}.brand-mark svg{width:22px}.brand b{display:block;font-size:15px}.brand small{display:block;color:#cbd5e1;font-size:11px;margin-top:2px}.nav-actions{display:flex;align-items:center;gap:6px}.icon-btn{display:flex;align-items:center;gap:7px;padding:9px 11px;border-radius:12px;color:#dbeafe;font-size:12px;white-space:nowrap}.icon-btn:hover{background:rgba(255,255,255,.09)}.icon-btn svg{width:17px;height:17px}.page-shell{max-width:1240px;margin:auto;padding:32px 20px 56px}.hero{position:relative;overflow:hidden;border-radius:28px;background:radial-gradient(circle at 85% 20%,rgba(99,102,241,.42),transparent 26%),linear-gradient(135deg,#0f172a,#1e293b 55%,#312e81);color:#fff;padding:38px;box-shadow:var(--shadow)}.hero:after{content:"";position:absolute;width:240px;height:240px;border:1px solid rgba(255,255,255,.12);border-radius:50%;right:-70px;bottom:-90px}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 11px;border-radius:999px;background:rgba(255,255,255,.10);font-size:12px;font-weight:700;color:#dbeafe}.hero h1{font-size:clamp(28px,4vw,48px);line-height:1.16;margin:16px 0 10px;max-width:850px}.hero p{margin:0;max-width:760px;color:#cbd5e1;font-size:15px;line-height:1.8}.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.meta-pill{padding:8px 12px;border-radius:12px;background:rgba(255,255,255,.09);font-size:12px;color:#e2e8f0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:30px 0 14px}.section-head h2{margin:0;font-size:22px}.section-head p{margin:4px 0 0;color:var(--muted);font-size:13px}.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.lesson-card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 8px 30px rgba(15,23,42,.06);transition:.2s;min-height:260px;display:flex;flex-direction:column}.lesson-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.phase-chip{display:inline-flex;align-items:center;gap:6px;width:max-content;padding:6px 10px;border-radius:999px;font-size:11px;font-weight:800;letter-spacing:.04em}.phase-plan{--accent:var(--plan)}.phase-do{--accent:var(--do)}.phase-check{--accent:var(--check)}.phase-act{--accent:var(--act)}.phase-chip{color:var(--accent);background:color-mix(in srgb,var(--accent) 11%,white)}.lesson-card h3{font-size:18px;line-height:1.45;margin:16px 0 8px}.lesson-card p{font-size:13px;line-height:1.75;color:var(--muted);margin:0}.lesson-card .card-footer{margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;border-top:1px dashed var(--line)}.lesson-number{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:var(--accent);color:#fff;font-weight:800}.arrow{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:#f8fafc;color:#334155}.student-panel{display:flex;gap:16px;align-items:center;background:#fff;border:1px solid var(--line);padding:16px 18px;border-radius:18px;margin:18px 0}.student-avatar{width:46px;height:46px;border-radius:15px;display:grid;place-items:center;background:#0f172a;color:#fff;font-weight:800}.student-panel b{display:block}.student-panel span{font-size:12px;color:var(--muted)}.progress-track{height:9px;border-radius:999px;background:#e2e8f0;overflow:hidden;flex:1}.progress-track>i{display:block;height:100%;background:linear-gradient(90deg,#4f46e5,#06b6d4);border-radius:inherit}.demo-notice{display:flex;align-items:flex-start;gap:12px;margin:18px 0;padding:14px 16px;border-radius:16px;background:#fff7ed;border:1px solid #fdba74;color:#9a3412}.demo-notice svg{width:20px;flex:0 0 auto}.demo-notice b,.demo-notice span{display:block}.demo-notice span{font-size:12px;margin-top:2px}.demo-badge{display:inline-flex;padding:4px 8px;border-radius:999px;background:#fff7ed;color:#c2410c;border:1px solid #fed7aa;font-size:10px;font-weight:800}.lesson-hero{background:#fff;border:1px solid var(--line);border-radius:24px;overflow:hidden;box-shadow:0 12px 40px rgba(15,23,42,.07)}.lesson-band{padding:26px 28px;background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 95%,#0f172a),#0f172a);color:#fff}.lesson-band .phase-chip{background:rgba(255,255,255,.14);color:#fff}.lesson-band h1{font-size:clamp(24px,3vw,36px);margin:13px 0 7px}.lesson-band p{margin:0;color:#e2e8f0}.tabs{display:flex;gap:8px;padding:14px 18px;border-bottom:1px solid var(--line);overflow:auto;background:#fff}.tab{padding:9px 12px;border-radius:10px;font-size:13px;font-weight:700;color:#475569;white-space:nowrap}.tab.active,.tab:hover{background:#f1f5f9;color:#0f172a}.content-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(320px,.8fr);gap:20px;margin-top:20px}.panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:0 7px 26px rgba(15,23,42,.04)}.panel h2,.panel h3{margin-top:0}.objective-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}.objective-list li{display:flex;gap:10px;font-size:13px;line-height:1.7;color:#334155}.objective-list li:before{content:"✓";width:23px;height:23px;border-radius:8px;display:grid;place-items:center;background:color-mix(in srgb,var(--accent) 12%,white);color:var(--accent);font-weight:800;flex:0 0 auto}.knowledge-stack{display:grid;gap:14px}.knowledge-card{padding:18px;border:1px solid var(--line);border-radius:17px;background:linear-gradient(180deg,#fff,#fbfdff)}.knowledge-card h3{font-size:16px;margin:0 0 7px}.knowledge-card p{font-size:13px;color:#475569;line-height:1.8;margin:0}.flow{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin-top:13px}.flow span{padding:6px 10px;border-radius:9px;background:#eef2ff;color:#3730a3;font-size:11px;font-weight:800}.flow i{color:#94a3b8;font-style:normal}.worksheet{display:grid;gap:16px}.question{border:1px solid var(--line);border-radius:18px;padding:18px;background:#fff}.question-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;margin-bottom:10px}.question label.title{font-weight:800;font-size:14px}.question small{display:block;color:var(--muted);line-height:1.55;margin-top:4px}.input,textarea.input{width:100%;border:1px solid #cbd5e1;border-radius:12px;padding:11px 12px;font:inherit;font-size:13px;background:#fff;outline:none;transition:.15s}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 10%,transparent)}textarea.input{min-height:105px;resize:vertical}.radio-list,.check-list{display:grid;gap:8px}.choice{display:flex;gap:9px;align-items:flex-start;padding:10px 11px;border:1px solid var(--line);border-radius:11px;font-size:13px}.choice:hover{background:#f8fafc}.choice input{margin-top:3px}.action-bar{position:sticky;bottom:14px;z-index:20;margin-top:18px;padding:12px;border-radius:16px;background:rgba(15,23,42,.92);backdrop-filter:blur(12px);display:flex;justify-content:flex-end;gap:9px;box-shadow:0 16px 40px rgba(15,23,42,.24)}.btn{border:0;border-radius:12px;padding:10px 14px;font:inherit;font-size:13px;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;gap:8px}.btn-primary{background:#fff;color:#0f172a}.btn-accent{background:var(--accent);color:#fff}.btn-soft{background:#f1f5f9;color:#334155}.btn-danger{background:#fee2e2;color:#991b1b}.btn svg{width:17px}.empty{padding:30px;text-align:center;color:var(--muted)}.login-wrap{max-width:520px;margin:50px auto}.login-card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:30px;box-shadow:var(--shadow)}.login-card h1{margin:10px 0 6px}.login-card p{color:var(--muted);font-size:13px}.form-row{display:grid;gap:7px;margin:16px 0}.form-row label{font-size:12px;font-weight:800}.teacher-grid{display:grid;grid-template-columns:320px 1fr;gap:20px}.student-list{display:grid;gap:8px}.student-item{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px;border:1px solid var(--line);border-radius:13px}.student-item:hover{background:#f8fafc}.student-item b{font-size:13px}.student-item small{display:block;color:var(--muted)}.status-dot{width:10px;height:10px;border-radius:50%;background:#94a3b8}.status-dot.done{background:#10b981}.evidence-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.evidence-card{border:1px solid var(--line);border-radius:16px;padding:16px}.evidence-card h3{margin:8px 0}.evidence-card p{font-size:12px;color:var(--muted)}.capture-shell{max-width:1080px;padding:0;margin:0 auto}.capture-page{background:white;padding:28px 32px;min-height:100vh}.capture-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;border-bottom:2px solid #0f172a;padding-bottom:14px;margin-bottom:16px}.capture-head h1{font-size:24px;margin:0}.capture-head p{font-size:12px;color:#475569;margin:5px 0 0}.capture-meta{text-align:right;font-size:11px;color:#64748b}.capture-section{margin:16px 0}.capture-section h2{font-size:17px;margin:0 0 9px}.capture-answer{border:1px solid #cbd5e1;border-radius:12px;padding:12px 14px;margin:8px 0;background:#fff;break-inside:avoid}.capture-answer b{display:block;font-size:12px;margin-bottom:4px}.capture-answer div{font-size:13px;line-height:1.65;color:#334155;white-space:pre-wrap}.capture-knowledge{display:grid;grid-template-columns:1fr 1fr;gap:10px}.capture-knowledge .knowledge-card{padding:14px}.capture-watermark{position:fixed;inset:auto 18px 18px auto;font-size:10px;color:#c2410c;border:1px solid #fdba74;background:#fff7ed;padding:5px 8px;border-radius:999px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:14px}.metric{padding:14px;border-radius:16px;background:#f8fafc;border:1px solid var(--line)}.metric b{font-size:22px;display:block}.metric span{font-size:11px;color:var(--muted)}.mini-note{padding:12px 14px;border-radius:12px;background:#eff6ff;color:#1e40af;font-size:12px;line-height:1.7}.muted{color:var(--muted)}.nowrap{white-space:nowrap}
@media(max-width:980px){.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.content-grid,.teacher-grid{grid-template-columns:1fr}.evidence-grid{grid-template-columns:1fr}.nav-actions .icon-btn span{display:none}.icon-btn{padding:9px}.brand small{display:none}}
@media(max-width:620px){.page-shell{padding:18px 12px 38px}.topbar-inner{padding:10px 12px}.hero{padding:26px 20px;border-radius:22px}.grid-4{grid-template-columns:1fr}.lesson-card{min-height:220px}.student-panel{align-items:flex-start;flex-wrap:wrap}.progress-track{flex-basis:100%}.lesson-band{padding:22px 18px}.panel{padding:16px;border-radius:16px}.content-grid{gap:12px}.two-col{grid-template-columns:1fr}.action-bar{left:8px;right:8px}.capture-page{padding:18px 16px}.capture-knowledge{grid-template-columns:1fr}.capture-head{display:block}.capture-meta{text-align:left;margin-top:8px}}
@media print{body{background:#fff}.no-print,.topbar,.footer,.action-bar{display:none!important}.page-shell,.capture-shell{max-width:none;padding:0}.panel,.lesson-hero{box-shadow:none}.capture-page{padding:12mm}.capture-watermark{position:fixed;bottom:6mm;right:6mm}.capture-answer,.knowledge-card{break-inside:avoid}}

.footer{max-width:1240px;margin:0 auto 30px;padding:0 20px;display:flex;justify-content:space-between;gap:14px;align-items:center;color:#475569;font-size:12px}.footer b,.footer span{display:block}.footer-note{padding:9px 12px;border-radius:999px;background:#e2e8f0;color:#0f172a;font-weight:700}.glass-card{background:linear-gradient(180deg,#ffffff,#f8fbff);box-shadow:0 12px 32px rgba(15,23,42,.08)}.hero-premium{background:radial-gradient(circle at 80% 18%,rgba(96,165,250,.35),transparent 24%),radial-gradient(circle at 18% 18%,rgba(129,140,248,.28),transparent 20%),linear-gradient(135deg,#0f172a,#1f2937 50%,#312e81)}.student-panel-pro{box-shadow:0 10px 28px rgba(15,23,42,.08)}.premium-panel{background:linear-gradient(180deg,#ffffff,#fbfdff)}.capture-shell{max-width:1180px;padding:20px 0 40px}.capture-page{position:relative;background:linear-gradient(180deg,#fff,#fcfdff);padding:34px 36px 30px;min-height:100vh;border:1px solid #dbe4f2;border-radius:24px;box-shadow:0 16px 36px rgba(15,23,42,.08);margin-bottom:22px;overflow:hidden}.capture-ribbon{position:absolute;left:0;top:0;width:100%;height:8px;background:linear-gradient(90deg,var(--accent),color-mix(in srgb,var(--accent) 35%,#0f172a))}.capture-head.pro{display:grid;grid-template-columns:minmax(0,1.2fr) 360px;gap:24px;align-items:start;border-bottom:1px solid #dbe4f2;padding:8px 0 18px;margin-bottom:18px}.capture-title-block h1{font-size:28px;line-height:1.3;margin:12px 0 7px}.capture-title-block p{margin:0;color:#475569;font-size:13px;line-height:1.8}.document-chip{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:#eff6ff;color:#1d4ed8;font-size:11px;font-weight:800;letter-spacing:.03em;margin-bottom:10px}.capture-meta.card{background:linear-gradient(180deg,#ffffff,#f8fbff);border:1px solid #dbe4f2;border-radius:18px;padding:16px 18px;text-align:left;font-size:12px;color:#334155;box-shadow:0 10px 22px rgba(15,23,42,.05)}.capture-meta.card b{display:block;font-size:13px;color:#0f172a;margin-bottom:12px}.meta-grid{display:grid;grid-template-columns:110px 1fr;gap:8px 10px}.meta-grid span{color:#64748b}.meta-grid strong{font-weight:700;color:#0f172a}.capture-section{margin:18px 0}.capture-section h2{font-size:18px;margin:0 0 12px;color:#0f172a}.capture-answer{border:1px solid #d7e2f0;border-radius:16px;padding:14px 16px;margin:10px 0;background:#fff;box-shadow:0 6px 18px rgba(15,23,42,.03);break-inside:avoid}.capture-answer b{display:block;font-size:12px;margin-bottom:6px;color:var(--accent);text-transform:uppercase;letter-spacing:.03em}.capture-answer div{font-size:13px;line-height:1.75;color:#334155;white-space:pre-wrap}.capture-knowledge{display:grid;grid-template-columns:1fr 1fr;gap:12px}.capture-knowledge .knowledge-card{padding:16px;border-color:#dbe4f2;box-shadow:0 6px 20px rgba(15,23,42,.04)}.flow-large span{padding:8px 12px;border-radius:10px;font-size:12px}.capture-footer{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-top:22px;padding-top:14px;border-top:1px dashed #cbd5e1;font-size:11px;color:#64748b}.capture-mode{background:linear-gradient(180deg,#edf2ff 0,#f8fafc 100%)}
@media(max-width:980px){.footer{padding:0 12px;flex-direction:column;align-items:flex-start}.capture-head.pro{grid-template-columns:1fr}.capture-meta.card{max-width:none}}
@media(max-width:620px){.capture-page{padding:20px 16px;border-radius:16px}.capture-title-block h1{font-size:22px}.document-chip{margin-bottom:8px}.meta-grid{grid-template-columns:1fr}.capture-footer{display:block}.capture-footer span{display:block;margin-top:4px}}
@media print{.capture-page{margin:0;border:0;border-radius:0;box-shadow:none;padding:12mm}.capture-head.pro{grid-template-columns:minmax(0,1.2fr) 70mm}.document-chip{background:#eef2ff}.capture-footer{margin-top:16px}}

/* Product Studio field guide + AI prompt demo (period 2 Explore & Explain) */
.field-guide{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px}
.field-guide-item{padding:14px;border:1px solid var(--line);border-radius:14px;background:#f8fafc}
.field-guide-item b{display:block;font-size:13px;color:#0f172a;margin-bottom:5px}
.field-guide-item span{display:block;font-size:12px;color:#475569;line-height:1.7}
.prompt-demo{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}
.prompt-box{padding:14px 16px;border-radius:14px;border:1px solid #c7d2fe;background:#eef2ff}
.prompt-box.output{border-color:#a7f3d0;background:#ecfdf5}
.prompt-box b{display:flex;align-items:center;gap:6px;font-size:12px;color:#3730a3;margin-bottom:7px}
.prompt-box.output b{color:#047857}
.prompt-box p{margin:0;font-size:13px;line-height:1.75;color:#334155;white-space:pre-wrap}
.verify-list{margin-top:14px;padding:14px 16px;border-radius:14px;background:#fff7ed;border:1px solid #fdba74}
.verify-list b{display:flex;align-items:center;gap:6px;font-size:12px;color:#9a3412;margin-bottom:8px}
.verify-list ul{margin:0;padding-left:18px;display:grid;gap:6px}
.verify-list li{font-size:12px;line-height:1.7;color:#7c2d12}
@media(max-width:720px){.field-guide,.prompt-demo{grid-template-columns:1fr}}

/* Clear owner label at the top of each worksheet */
.owner-tag{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:11px 14px;border-radius:13px;background:#eef2ff;border:1px solid #c7d2fe;color:#3730a3;font-size:13px;margin-bottom:16px}
.owner-tag b{color:#312e81}
.owner-tag span{color:#4338ca;font-size:12px}